Job Description — Senior Full Stack Developer (React Focus)About CebirCebir is a leading provider of scientifically validated assessment solutions, helping organizations across sectors make better HR decisions in recruitment, internal mobility, and talent development. Our platform combines robust psychometric testing with modern technology, enabling data-driven decisions at scale.As we continue to evolve our platform, we are looking for a Senior Full Stack Developer to join our IT team and help shape what comes next.Your RoleAs a Senior Full Stack Developer (React Focus), you will play a key role in shaping and scaling our platform.You'll join a small, highly collaborative team (3–5 developers) where your impact is immediate and visible. Within this team, you'll act as the go-to React specialist, helping drive frontend quality, architecture, and best practices.This is a hands-on role with real ownership, not just building features, but also influencing how we build them and how they feel to users.Tech StackYou'll be working with a modern and pragmatic stack:React, TypeScript, Next.JsTanStack Query & TableZustandReact Hook FormCSS ModulesHTML / CSSGitBlade (basic usage)Key ResponsibilitiesBuild and ship features from idea to productionTake ownership of parts of the applicationHelp shape frontend decisions (structure, patterns, libraries, etc.)Improve performance and overall code qualityEnsure what we build is not just functional, but also intuitive and enjoyable to useYour Profile5+ years of experience in frontend or full stack developmentStrong experience with React + TypeScript(Angular/Vue background is fine if you've moved to React)Solid fundamentals in HTML & CSSComfortable working in a small team where ownership is keyYou care about UI/UX — not in a designer way, but you notice when things feel offNice to HaveExperience with Next.JsFamiliarity with TanStackExperience in SaaS or data-driven platformsInterest in UX and building intuitive interfacesExperience taking technical ownershipWhat We OfferHybrid role – Zaventem based and remoteA small team where your work truly mattersReal ownership - not just ticketsInfluence on technical decisionsA modern stack (with room to improve it)Competitive salaryWhy Join Cebir?With a team of around 20 colleagues, we offer the agility of a small company where your work has immediate and visible impact. You'll collaborate closely with a compact team and contribute directly to the evolution of our platform.Ownership and autonomy are central to how we work. You take responsibility for what you build, contribute to technical decisions, and help shape how our product evolves, both in functionality and in quality.We are in a dynamic phase of technological transformation, giving you the opportunity to work on meaningful challenges, improve what exists, and build what's next, while continuously developing your own skills.Recruitment ProcessWe aim to keep our hiring process transparent and meaningful:First interview: an introductory conversation to get to know each otherCebir assessment: a scientifically validated assessment that gives us deeper insight into your strengths, while also giving you a first-hand experience of our productSecond interview: a deeper dive into your experience, expectations, and team fitOffer & welcome onboard: if it's a match, we'll be excited to welcome you to the team